*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;

    font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', '微软雅黑', Arial, sans-serif;

}
